Tellurian.



H. L. BRBTSGH.

A TBLLUBIAN. i

' APPLITION FILED MAY 23, 1911.

2 SHEETS-SHEET l.

@wi/Almen@ Patented Nov. 28, 1911.

H. L. .BRETSGIL TBLLURIAN.

APPLICATION FILED MAY 23, 1911.

Patented Nov. 28, 1911.

me/Wto@ 2 SHEETS-SHEET 2.

cLuMBxA PLANouRAPH co..wHlNaTON, D. c.

HOMER L. BRETSCH, 0F HASTINGS UPON HUDSON, NEW YORK.

TELLURIAN.

Speecaton of Letters Patent.

Patented Nov. 28, 1911.

Application filed May 23, 1911. Serial No. 629,031.

To all whom it may concern:

Be it known that I, HOMER L. BRn'rscH, a citizen of the United States,residing at Hastings upon Hudson, in the county of Vestchester and Stateof New York, have invented new and useful Improvements in Tellurians, ofwhich the following is a specification.

This invention relates to tellurians and one of the principal objects ofthe invention is to construct a simple and efficient device of thischaracter whereby the following important facts may be conclusivelydetermined: the part of the earths surface illuminated by the sun at anyone time, also the part which is in shadow; the-position of the twilightbelt; the motions of the earth; rotation and revolution; the inclinationand parallelism of the earths axis; the succession of day and night; thevariations of length of day and night at different seasons and indilerent latitudes; the cause of the midnight sun; the reason for equalday and equal night at the equator at all times; and the reason .for thepeculiar seasons of the poles; the position of the vertical rays of thesun at any day of the year; the fact that the location of the fourclimatic circles is determined by the amount of inclination of theearths axis; the determining causes of the widths of the zones; and theunequal distribution of heat and hence climatic varations; Y

A further object of the invention is to so mount a globethat theinclination of the earths axis may be changed, and a still furtherobject is to provide means whereby the device will indicate the earthpassing through the summer and winter solstices and the autumnal andvernal equinoxes.

Further objects of the invention will appear as the following specicdescription is read in connection with the accompanying drawings, whichform a part of this application, and in which Figure 1 is a sideelevation. Fig. 2 is a top plan view. Fig..3 is a vertical longitudinalsection. Fig. 4 is a horizontal section on the line 4 4 of Fig. 3. Fig.5 is a detail vertical sectional view on the line 5 5 of Fig. 1. Fig. 6is a bottom plan view of the axis quadrant.

Referring more particularly to the draw- On the upper surface of thebase, adjacent the periphery thereof, is spaced suitable indicia 3 and 4indicating the months of the year and the signs of the Zodiac and alsolines 5 and 6 indicating the time in which the earth passes through thesolstices and equinoxes, the months of the year being arrangedanti-clockwise. The center of the base is provided with the frustum of acone 7 through which and through the base extends a shaft 8 upon whichis journaled a globe supporting arm 9, the same being held down upon thecone by a conical washer 10 secured to the shaft. The arm is providedwith a pointer 11 adapted to 'operate over the face of the base. arm issupported by means of a roller 12 operating over the base and carried bya bracket 13 secured to the underside of the arm. The arm 9 ispreferably hollow and has secured therein the bearing members 14, 15 and16 in which is journaled a transmission shaft 17 having pinions 18 and-19 secured upon opposite ends thereof. The pinlon 18 is in mesh with abevel gear 20 secured to the top of the cone and the pinion 19 is inmesh with a similar bevel gear 21 mounted upon a shaftv 22 extendingvertically from the arm and carrying, upon its upper end, an axisquadrant 23. This quadrantis provided with a longitudinal slot 24 inwhich the axle 25 is adjustably secured, said axle havinga collar 26which seats upon the top of the quadrant and its outer end threaded toreceive the llocking nut 27 which secures the axle in adjusted positionin the quadrant. The quadrant is also graduated, as 1shown at 28, todetermine the angle of the ax e.

J ournaled upon the axle is an ordinary globe 29 representing the earthand having the different zones marked thereon. Surrounding the axle 25and secured to the underneath side of the globe is a gear 30 which is inmesh with a gear 31 carried upon a transmission shaft 32 mounted in aplate 33 adjustably carried by the quadrant. The lower end of the shaftis provided with a bevel gear 34 which is in mesh with a similar butlarger gear 35 held stationary upon the arm surrounding the shaft 22.Thus it will be noticed that as the arm 9 is rotated upon the shaft 8the pinion 18 will be rotated by engagement with the gear 20 and thusthrough the pinion 19 and gear 21 the The free end of the' l and thetwilight belt may be clearly shown upon the globe during all periods andat all places, there is secured to the arm a standard 36 from whichprojects a horizont-al yoke member 37 surrounding one-half of the globeand having secured to its outer ends a substantially semi-circular bar38 which is of sufficient size to permit the passage of the globe in allits positions. Spaced away from the bar 38 is a similar bar 39 which hasits ends stepped in the supporting member 37 and is connected to the bar38 by a bridge piece 40 which has its outer end threaded and pass-edthrough the member 38 and provided with a. thumb nut 4l, so that themember 39 is spaced away from the member 38 a distance corresponding to18o upon the globe which is the width of the twilight belt.

Mounted upon the end of the shaft 8, which is hollow, is an electricglobe 42 having a connection with a source of supply by wires 43 whichextend through the shaft and a pipe 44 is also connected to the shaft,so that the sun may be represented by a gas globe instead of an electricincandescent light.

1 In order that the position of the vertical rays may be indicated uponthe globe a standard 45 is secured to the arm intermediate its length.and mounted upon the upper end of .the standard is a thin arm 46 whichis in line with the sun and with the 90O mark onv the quadrant or withthe inter-` mediate point between the poles. By rotating the armanti-clockwise over the base the before-mentioned results may be readilydetermined.

Having thus described the invention, what I claim as new is zl.; In adevice of t-he class described, the combination with a base, of an armrotatably mounted thereon, a quadrant, means actuated in the rotation ofthe arm for rotating the quadrant, a shaft adjustably mounted in thequadrant, and a globe rotatably mounted upon the shaft.

2. Ina device of the class described, a

base, an arm rotatably mounted thereon, a

shaft extending therethrough, a gear surrounding the shaft and keyed tothe base, a gear rotatably mounted in the arm, an operating connectionbetween the gear on the base and the last-named gear, a quadrant securedto the last-named gear and having a slot therein, a shaft adjustablymounted in the slot, a globe rotatably mounted upon the shaft, and adriving connection for the globe.

3. In a device of the class described, a base, an arm rotatably mountedthereon, a shaft extending therethrough, a gear surrounding the shaftand keyed to the base, a gear rotatably mounted in the arm, an operatingconnection between the gear on the base and the last-named gear, aquadrant secured to t-he last-named gear and having a slot therein, ashaft adjustably mounted in the slot, a globe rotatably mounted upon theshaft, a gear secured tothe arm, a gear secured to the globe, and aconnection adjustably mounted upon the quadrant and eX- tending betweensaid last-named gears.

In testimony whereof I affix my signature in presence of two witnesses.

I-IOMER L. BRETSCI-I.

Witnesses:

CLARENCE D. HANroRD, EDWIN F. BALDWIN.

' V(loaes of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. C.

